A hierarchical architecture for increasing efficiency of large photovoltaic plants under non-homogeneous solar irradiation

Fabio Viola, Eleonora Riva Sanseverino, Ninh Nguyen Quang, Pietro Romano, Ninh Nguyen Quang, Thanh Ngo Ngoc, Quang Nguyen Phung, Hoang Nguyen Huy, Thang Tran Trong, Binh Doan Van

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Under non-homogeneous solar irradiation, photovoltaic (PV) panels receive different solar irradiance, resulting in a decrease in efficiency of the PV generation system. There are a few technical options to fix this issue that goes under the name of mismatch. One of these is the reconfiguration of the PV generation system, namely changing the connections of the PV panels from the initial configuration to the optimal one. Such technique has been widely considered for small systems, due to the excessive number of required switches. In this paper, the authors propose a new method for increasing the efficiency of large PV systems under non-homogeneous solar irradiation using Series-Parallel (SP) topology. In the first part of the paper, the authors propose a method containing two key points: a switching matrix to change the connection of PV panels based on SP topology and the proof that the SP-based reconfiguration method can increase the efficiency of the photovoltaic system up to 50%. In the second part, the authors propose the extension of the method proposed in the first part to improve the efficiency of large solar generation systems by means of a two-levels architecture to minimize the cost of fabrication of the switching matrix.
Original languageEnglish
Pages (from-to)1306-1319
Number of pages14
JournalSolar Energy
Volume188
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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